I am looking for assistance in finding the experimental films of Kenneth Macpherson and Winifred Bryher (Macpherson's wife)-- Wing Beat (1927), Foothills (1928), Monkey's Moon (1929) and Borderline (1930). My research suggests that only Borderline is extant, however I have not found where to obtain it. I am interested in any excerpts if the other three that seem unnavailable.
Thank you!